Add comments.

src/standard/annotations.html

@@ -244,15 +244,18 @@
         for (var j=0; j<bindings.length; j++) {
           var binding = bindings[j];
           if (binding.isCompound) {
+            // Create compound storage map
             var storage = node.__compoundStorage__ ||
               (node.__compoundStorage__ = {});
             var parts = binding.parts;
+            // Copy literals from parts into storage for this binding
             var literals = new Array(parts.length);
             for (var k=0; k<parts.length; k++) {
               literals[k] = parts[k].literal;
             }
             var name = binding.name;
             storage[name] = literals;
+            // Configure properties with their literal parts
             if (binding.kind == 'property') {
               var literal = literals.join('');
               if (node._configValue) {